Net Safety Monitoring M21 Specifications
M21 Transmitter
FGD-PDS-M21-Transmitter
M21 Transmitter
Single Channel Universal Gas Monitoring
The Millennium II (M21) single channel universal
transmitters have been engineered from the
ground-up to include the innovative features
that managers and operators in the field
demand, while providing rock solid day-to-day
operation, even in the most extreme conditions.
The Millennium II redefines what you expect
from a fixed gas detection solution.
M21 (SS & AL) shown with SX3 Series Sensors
Product Data Sheet
July 2016
Universal transmitter — compatible with all
sensor types (infrared, catalytic bead, and
electrochemical)
Wide voltage range allows for greater stability
and system compatibility
Lowest power consumption available
Universal Transmitter
The transmitter can be tted with a wide range of toxic or
combustible gas sensors. Sensors are pre-calibrated and
easily connected to the transmitter which recognizes a newly
tted sensor, automatically uploading the sensor’s speci c
con guration pro le.
Digital Communications
Sensor and transmitter continuously communicate digitally,
giving you the con dence of stable, accurate protection with
fast response times even over long separation distances.
Easy To Use Menus
English, French, Portuguese, or Spanish display languages
included. The full text menu makes installation, operation, and
calibration simple. No manual necessary!
Full diagnostics with event and data logging
Intuitive menu system provides operators with
non-intrusive set-up and calibration interface
Field selectable gas curves and ranges
Long range (+2,000 ft/600 m) sensor separation
Superior OLED Display
The only full graphic OLED display available, easy to read in all
ambient lighting conditions.
Analog, Relay, Modbus RS485 RTU
& HART
Multiple communication protocols are available combined with
relays to allow the M21 Transmitter to work seamlessly with
your system.
®
Field-proven Sensor Innovations
All of our sensors are engineered to be fast and reliable
with eld-proven performance in the harshest industrial
conditions possible. These include a full range of fast response
Electrochemical toxic gas sensors. For combustible gas
detection, poison resistant Catalytic Bead technology with
SensorGuard, which greatly prolongs sensor life and Infrared
sensor technology utilizing a dual beam design with no mirrors
that can become contaminated (“fogged up”) or misaligned.
M21 Transmitter
Specifications
Table 1 - Millennium II M21 Single Channel Transmitter
Electrical
Power Consumption 2.4 W @ 24 VDC (average - varies by sensor types/quantities)
®
Voltage Range 10.5–32.0 VDC (HART
EMC Compliance EN 50270:2006 per EMC directive 2004/108/EC
Display Organic LED (OLED), Power/Status LED‘s
Environmental
Temperature -67 °F to +185 °F (-55 °C to +85 °C ) - Stainless steel
-58 °F to +185 °F (-50 °C to+85 °C ) - Stainless steel - North American explosion-proof certication
-40 °F to +185 °F (-40 °C to +85 °C ) - Aluminum
Relative Humidity 0–95 % RH non condensing
Ingress Protection IP66 (Aluminum), IP67 (Stainless Steel), IP64 (with sensors) Type 4X
Mechanical
Enclosure Material Cast Aluminum (A359) or Stainless Steel (SS316)
Conduit Opening ¾'' NPT (3X)
Outputs Standard: Analog 4–20 mA
Optional: Four 5 A Form C Relays, and RS 485 Modbus
Certifications North American
Class I, Division 1, Groups BCD T5
Class I, Zone 1, AEX/Ex d IIB+H2 T5
-50 °C ≤ Ta ≤ + 85 °C
NEMA Type 4X/IP67
FM6320, ANSI/ISA 12.13.01, CSA 22.2 No. 152:2006
IECEx
Ex d IIB+H2 T5 Gb
IECEx DNV 12.0014 (Aluminum) IP66, controller only
IECEx FMG 12.0006X (Stainless Steel) IP 67, controller only
IEC 60079-0: 2007-10 & IEC 60079-1: 2007-04
Inmetro
Ex d IIB+H2 T5 Gb IP67
Sensors Combustible Gases: SC3 Series Infrared and Catalytic Bead
Toxic Gases: ST3 Series Electrochemical
Warranty 3 years
Mounting Surface Mount/Pipe Mount/Duct Mount
Weight Aluminum: 5.5 lbs (2.5 kg), Stainless steel: 7.0 lbs (3.2 kg)
: 18–32 VDC)
®
RTU, and HART
July 2016
®
Ordering Information
M21-A Single Channel - Analog
M21-AR Single Channel - Analog & Relay
M21-AD Single Channel - Analog & Modbus
M21-ARD Single Channel - Analog & Relay & Modbus
M21-AH Single Channel - Analog & HART
M21-AHR Single Channel - Analog & HART® & Relay
Enclosures Available: Aluminum (-A) Stainless Steel (-S)
Ordering Matrix Example:
M21-AH-S (Transmitter - Output - Enclosure Material)
®
Special Features
Current loop test jacks for each channel on faceplate
Non-intrusive one man calibration (magnetic switch)
Field selectable toxic gas ranges
Redundant menu access via push buttons
Sensor enable/disable option from menu (Cl1, Div2)
Alarm relays congurable/assignable to any channel
Displayed event logging (980 events)
Easily retrieve last calibration data from sensor
Four languages - English, French, Spanish, Portuguese
Accessories
Mounting Bracket Complete With Hardware
Sun Shade/Deluge Protection
Duct Mount and Hardware Kit
2 EmersonProcess.com/FlameGasDetection
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